How can I configure my OpenBSD to auto login (any user or root) after the boot sequence? ... I need some terminal commands..

If you know the commands to be executed, just create and use /etc/rc.local.

From the rc(8) man page:

Quote:

rc.local is executed towards the end of rc (it is not the very last as there are a few services that must be started at the very end). Normally, rc.local contains commands and daemons that are not part of the stock installation.